<template>
    <div class="login_container">
     <div class="login_box">
     <div class="avatar_box">
         <img src="../assets/logo.png" alt="">
     </div>
        <!--登录表单区域-->
       <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules"  label-width="0px" class="login_form">
           <!-- 用户名 -->
            <el-form-item label-width="0px" prop="username">
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
           <!-- 密码 -->
              <el-form-item prop="password">
                <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
            </el-form-item>
            <!-- 按钮 -->
             <el-form-item class="btns">
                 <el-button type="primary" @click="login">登录</el-button>
                 <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
       </el-form>
     </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        username: [{ required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在3 到 5 个字符之间', trigger: 'blur' }
        ],
        password: [{ required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在6 到 15 个字符之间', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
  // 点击重置按钮，重置登录表单
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    // this.$refs.loginFormRef.resetFileds()重置文件的意思，此题应该是重置字段
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('/login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        sessionStorage.setItem('token', res.data.token)
        var token = sessionStorage.getItem('token')
        console.log(token)
        // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    }
  }
}
</script>
<style lang="less" scoped>
.login_container {
    background-color: #2b4b6b;
    height: 100%;
}
.login_box {
    width:450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top:50%;
    transform: translate(-50%, -50%);
    .avatar_box{
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding:10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
        img{
            width: 100%;
            height: 100%;
             border-radius: 50%;
             background-color: #eee;
        }
    }
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
.btns {
    display: flex;
    justify-content: flex-end;
}
</style>
